mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-10 23:24:38 +00:00
f4955137f5
When generating ACPI tables we need to convert IRQs in U-Boot to the ACPI structures required by ACPI. This is a SoC-specific conversion and cannot be handled by generic code, so add a new IRQ method to do the conversion. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Wolfgang Wallner <wolfgang.wallner@br-automation.com> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
131 lines
3.6 KiB
C
131 lines
3.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* Generation of tables for particular device types
|
|
*
|
|
* Copyright 2019 Google LLC
|
|
* Mostly taken from coreboot file of the same name
|
|
*/
|
|
|
|
#ifndef __ACPI_DEVICE_H
|
|
#define __ACPI_DEVICE_H
|
|
|
|
#include <linux/bitops.h>
|
|
|
|
struct udevice;
|
|
|
|
/* ACPI descriptor values for common descriptors: SERIAL_BUS means I2C */
|
|
#define ACPI_DESCRIPTOR_LARGE BIT(7)
|
|
#define ACPI_DESCRIPTOR_INTERRUPT (ACPI_DESCRIPTOR_LARGE | 9)
|
|
#define ACPI_DESCRIPTOR_GPIO (ACPI_DESCRIPTOR_LARGE | 12)
|
|
#define ACPI_DESCRIPTOR_SERIAL_BUS (ACPI_DESCRIPTOR_LARGE | 14)
|
|
|
|
/* Length of a full path to an ACPI device */
|
|
#define ACPI_PATH_MAX 30
|
|
|
|
/* Values that can be returned for ACPI device _STA method */
|
|
enum acpi_dev_status {
|
|
ACPI_DSTATUS_PRESENT = BIT(0),
|
|
ACPI_DSTATUS_ENABLED = BIT(1),
|
|
ACPI_DSTATUS_SHOW_IN_UI = BIT(2),
|
|
ACPI_DSTATUS_OK = BIT(3),
|
|
ACPI_DSTATUS_HAS_BATTERY = BIT(4),
|
|
|
|
ACPI_DSTATUS_ALL_OFF = 0,
|
|
ACPI_DSTATUS_HIDDEN_ON = ACPI_DSTATUS_PRESENT | ACPI_DSTATUS_ENABLED |
|
|
ACPI_DSTATUS_OK,
|
|
ACPI_DSTATUS_ALL_ON = ACPI_DSTATUS_HIDDEN_ON |
|
|
ACPI_DSTATUS_SHOW_IN_UI,
|
|
};
|
|
|
|
/** enum acpi_irq_mode - edge/level trigger mode */
|
|
enum acpi_irq_mode {
|
|
ACPI_IRQ_EDGE_TRIGGERED,
|
|
ACPI_IRQ_LEVEL_TRIGGERED,
|
|
};
|
|
|
|
/**
|
|
* enum acpi_irq_polarity - polarity of interrupt
|
|
*
|
|
* @ACPI_IRQ_ACTIVE_LOW - for ACPI_IRQ_EDGE_TRIGGERED this means falling edge
|
|
* @ACPI_IRQ_ACTIVE_HIGH - for ACPI_IRQ_EDGE_TRIGGERED this means rising edge
|
|
* @ACPI_IRQ_ACTIVE_BOTH - not meaningful for ACPI_IRQ_EDGE_TRIGGERED
|
|
*/
|
|
enum acpi_irq_polarity {
|
|
ACPI_IRQ_ACTIVE_LOW,
|
|
ACPI_IRQ_ACTIVE_HIGH,
|
|
ACPI_IRQ_ACTIVE_BOTH,
|
|
};
|
|
|
|
/**
|
|
* enum acpi_irq_shared - whether interrupt is shared or not
|
|
*
|
|
* @ACPI_IRQ_EXCLUSIVE: only this device uses the interrupt
|
|
* @ACPI_IRQ_SHARED: other devices may use this interrupt
|
|
*/
|
|
enum acpi_irq_shared {
|
|
ACPI_IRQ_EXCLUSIVE,
|
|
ACPI_IRQ_SHARED,
|
|
};
|
|
|
|
/** enum acpi_irq_wake - indicates whether this interrupt can wake the device */
|
|
enum acpi_irq_wake {
|
|
ACPI_IRQ_NO_WAKE,
|
|
ACPI_IRQ_WAKE,
|
|
};
|
|
|
|
/**
|
|
* struct acpi_irq - representation of an ACPI interrupt
|
|
*
|
|
* @pin: ACPI pin that is monitored for the interrupt
|
|
* @mode: Edge/level triggering
|
|
* @polarity: Interrupt polarity
|
|
* @shared: Whether interrupt is shared or not
|
|
* @wake: Whether interrupt can wake the device from sleep
|
|
*/
|
|
struct acpi_irq {
|
|
unsigned int pin;
|
|
enum acpi_irq_mode mode;
|
|
enum acpi_irq_polarity polarity;
|
|
enum acpi_irq_shared shared;
|
|
enum acpi_irq_wake wake;
|
|
};
|
|
|
|
/**
|
|
* acpi_device_path() - Get the full path to an ACPI device
|
|
*
|
|
* This gets the full path in the form XXXX.YYYY.ZZZZ where XXXX is the root
|
|
* and ZZZZ is the device. All parent devices are added to the path.
|
|
*
|
|
* @dev: Device to check
|
|
* @buf: Buffer to place the path in (should be ACPI_PATH_MAX long)
|
|
* @maxlen: Size of buffer (typically ACPI_PATH_MAX)
|
|
* @return 0 if OK, -ve on error
|
|
*/
|
|
int acpi_device_path(const struct udevice *dev, char *buf, int maxlen);
|
|
|
|
/**
|
|
* acpi_device_scope() - Get the scope of an ACPI device
|
|
*
|
|
* This gets the scope which is the full path of the parent device, as per
|
|
* acpi_device_path().
|
|
*
|
|
* @dev: Device to check
|
|
* @buf: Buffer to place the path in (should be ACPI_PATH_MAX long)
|
|
* @maxlen: Size of buffer (typically ACPI_PATH_MAX)
|
|
* @return 0 if OK, -EINVAL if the device has no parent, other -ve on other
|
|
* error
|
|
*/
|
|
int acpi_device_scope(const struct udevice *dev, char *scope, int maxlen);
|
|
|
|
/**
|
|
* acpi_device_status() - Get the status of a device
|
|
*
|
|
* This currently just returns ACPI_DSTATUS_ALL_ON. It does not support
|
|
* inactive or hidden devices.
|
|
*
|
|
* @dev: Device to check
|
|
* @return device status, as ACPI_DSTATUS_...
|
|
*/
|
|
enum acpi_dev_status acpi_device_status(const struct udevice *dev);
|
|
|
|
#endif
|